The body gets most of its vitamin D not from diet but from skin exposed to the ultraviolet B radiation in sunlight.

身体获取的大部分维他命D不是从饮食而是靠皮肤曝露在阳光中的紫外线B射线取得的。

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B: Of body maybe. I'm not sure about the mind.

身体也许没问题，但我看头脑就不好说了。

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It takes a month for the body to make antibodies to a newly encountered pathogen, so a bunch of immune-system cells called B lymphocytes first fire back in a general way.

新的病原体进入机体后，机体一般需要一个月的时间才能产生相应的抗体，因此首先由免疫细胞——B淋巴细胞通过共同途径对病原体进行攻击。

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When the body breaks some more, you get the loss of biological or B-functioning, and then the body dies.

身体继续损坏，身体功能也会开始消失，肉体就死亡了。

耶鲁公开课 - 死亡课程节选

Now, these Th-cells, helper T-cells, go on to stimulate B-cells, and it's these B-cells that become the mature antibody producing cells that make quantities of antibody that fill up in your body.

这些辅助性T细胞,进一步刺激B淋巴细胞,从而使这些B淋巴细胞,逐渐发育成成熟的抗体生成细胞,可在体内产生大量抗体

耶鲁公开课 - 生物医学工程探索课程节选

However, closer examination revealed differences between men and women in two key components of the immune system - T-cells, which protect the body from infection, and B-cells, which secrete antibodies.

BBC: Biological clue to why women live longer than men

Without intrinsic factor, vitamin B-12 can't be absorbed and leaves your body as waste.

CNN: Vitamin deficiency anemia

Some experts have suggested that it may be more effective to supplement the minerals such as zinc and selenium that the body uses to produce catalase, MSR A and B, and tyrosinase, rather than take them directly.

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